Implementation-defined/unspecified/undefined behavior

[kawashima-fj]

This is a known issue.

Problem

There may be test programs which have implementation-defined/unspecified/undefined behaviors. Executions of such test programs may fail on certain conditions.

Details

This test suite was originally developed for the proprietary Fujitsu C/C++/Fortran compilers. There may be test programs which were written to test Fujitsu-specific behavior or depend on Fujitsu-specific behavior. We run all test programs using Clang/Flang with the -O0 option, checked causes of the errors, and eliminated such test programs found by the check. However, test programs which did not have errors may still have errors when the development of Clang/Flang progress or a higher optimization level is used, especially in the case of undefined behavior.

Workaround

None.

Future direction

We want to eliminate all the problematic test programs.

If you find a problematic test program, please let us know in a comment of this issue.